What is Fragile X Syndrome?Fragile X Syndrome is the most common known inherited cause of learning disabilities, affecting around 1 in 4000 males and 1 in 8000 females. It can cause a wide range of difficulties with learning, as well as social, language, attentional, emotional, and behavioral problems. In addition, approximately 1 in 250 females and 1 in 600 males are carriers of the fragile X pre-mutation. Some carriers may develop symptoms of one of the two Fragile X-associated Disorders. Therefore, fragile X consists of a family of three genetic conditions.